Motivation

I've noticed I have a slight lack of motivation this summer to complete my "To Do" list. I started the summer with several items . . . . and at this point - I have very few checked off. I am wondering what is preventing me from eagerly tackling that list? I'm not sure . . . . My DC trip was a good excuse for a while . . . and now my Boston/NYC trip that I will take soon is my new excuse . . . I need to find that motivation soon! Where is it??